US3558444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dye test for detecting strained areas in molded plastics
Assignee: Avisun Corp
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Filing: 1968-10-11
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Granted: 1971-01-26
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Expires: 1988-10-11
Abstract
Abstract A METHOD FOR QUALITATIVELY DETERMINING THE SURFACE STRAINS IN A MOLDED PLASTIC ARTICLE, THE STRAINS BEING RELATED TO THE PLATEABILITY OF SAID ARTICLE, BY CONTACTING SAID ARTICLE WITH A DISPERSE DYE SOLUTION HAVING SMALL DYE PARTICLES, SO AS TO STAIN SAID ARTICLE, THE DEPTH AND UNIFORMITY OF SHADE OF THE STAINED ARTICLE BEING AN INDICATION OF THE SURFACE STRAINS IN THE PLASTIC ARTICLE.
Inventors
- 👤 James E Fitzpatrick
- 👤 Habet M Khelghtian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:11
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/16; G01B11/20; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |